The British Parliament passed a law granting independence in July 1947. The law gave people only one month to decide which country they wanted to live in and to move there. As millions of people began to move, more violence broke out.
Calderas form when an enormous magma chamber under, what was probably a pretty ginormous volcano, empties and collapses, causing the land above it to collapse as well. An explosive caldera-forming eruption has never been witnessed first hand, but we know that they should pretty fearsome spectacles. Much smaller calderas atop effusive volcanoes (hawaiian style) have been observed. So, formation: maars form when a vent intersects groundwater and blasts out the overlying material.
All of a sudden, the Ring of Fire is starting to tremble violently. Last month, we had a whole bunch of major earthquakes along the Ring of Fire, and this month volcanoes all over the Ring of Fire are erupting. Of course there has always been seismic activity within this giant band that stretches around the Pacific Ocean. After all, approximately 75 percent of all volcanoes are located in the Ring of Fire and approximately 90 percent of all global earthquakes occur along the Ring of Fire. But what is alarming is that the level of activity appears to be rising.